of philadelphia



J. MORSS.

Square.

Patented Juiy 30, 1867.

",PETERS. PHDT gnitrh tetra gaunt ffitr.

J. MOB-$8,01 PHILADELPHIA, PENNSYLVANIA. Letters Patent No. 67,338,dated July 30, 1867.

IMPROVEMENT IN SQUARES.

fitlgt Eulntulz referrer in in first fixture-35mm mm making and at thesame.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, J; Monss, of Philadelphia, Pennsylvania, haveinvented an' improved Square; and I do hereby declare the following tobee. full, clear, and exact description of the same, reference being badto the accompanying drawing, and to the letters of reference markedthereon.

My invention consists of a square, constructed in the peculiar mannerfully described hereafter, so that. the blade can be adjusted in thestock, and the instrument rendered serviceable under circumstances whichwould not admit of the employment of an ordinary square.

In order to enable others skilled'in the art to make and usemy-invention, I will now proceed to describe its construction, referencebeing bad to the accompanying drawing, which forms a part of thisspecification, and in which.

Figure 1 is a sectional view of my improved square.

Figure 2, a transverse section on the line 1-2, fig. 1.

Figure 3, a perspective view; and

Figure 4, a view illustrating the advantages of my invention.

Similar letters refer to. similar parts throughout the several views.

A is the stock, and B the blade of the square, the former having on itsopposite parallel edges the metal I facings a a, anda't the top a slotfor the reception and guidance of the blade B, which has an elongatedopening, 6, the stem of a thumb-screw passing through this opening andthrough the stock into a nut, 2, let into the stock, as seen in fig. 2,so that the blade may be secured after adjustment. t is essential thatthe and f, fig. 1, of the slot in the stock should be atright angles tothe two edges a a of the same, for it should be understood that the stemof the thumb-screw is smaller than the opening 6 of the blade, so thatthe lower edge It of the latter may be adjustedaccurately to the endfofthe slot before it is secured by the screw, for upon the accuracy ofthis adjustment depends the truth of the instrument. One of theadvantages of my improved square is illustrated in fig. 4, where n:represents a shoulder or ledge, which has to be made at right angles tothe face 9.

A square of'the ordinary construction, with permanent stock and blade,could not be used for making the proper test unless the blade were muchshorter than those usually made; but after loosening the thumb-screw theblade B can be adjusted so that one end may project 'to the desiredlimited extent to suit the width of the ledge 0:, care beingtaken, asbefore remarked, to adjust the lower edge h of the blade "truly to theend f of the slot before the said blade is secured by the thumb-screw.

I claim as my invention, and desire to secure by Letters Patent- Theslotted blade B and thumb-screw and nut, or their equivalents, incombination with the stock A, its parallet edges :2 a, and bottom fatthe slot, arranged at right angles with the said edges, the whole beingconstructed as and for the purpose herein set forth.

In testimony whereot'I have signed my name to this specification in thepresence of two subscribing witnesses- .J'. MORSS.

I Witnesses:

CHARLES E. Foszrnn, W. J. R. DELANI.

